From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki

Planet Mars (火星, Ka-sei) is a planet in the North Galaxy.


Martians appeared in Go! Go! Ackman and Dr. Slump and made a cameo in Dragon Ball. It was the fourth planet from the Sun in Planet Earth's Solar System, just like its real world counterpart.

Video games

Mars was mentioned in Dragon Ball Z: The Legacy of Goku II.